transmission/libtransmission/sha1.h

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2006-07-16 19:39:23 +00:00
/*
sha1.h: Implementation of SHA-1 Secure Hash Algorithm-1
Based upon: NIST FIPS180-1 Secure Hash Algorithm-1
http://www.itl.nist.gov/fipspubs/fip180-1.htm
Non-official Japanese Translation by HIRATA Yasuyuki:
http://yasu.asuka.net/translations/SHA-1.html
Copyright (C) 2002 vi@nwr.jp. All rights reserved.
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgement in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as beging the original software.
3. This notice may not be removed or altered from any source distribution.
Note:
The copyright notice above is copied from md5.h by L. Petet Deutsch
<ghost@aladdin.com>. Thank him since I'm not a good speaker of English. :)
*/
#ifndef SHA1_H
#define SHA1_H
typedef unsigned int sha1_word_t; /* 32bits unsigned integer */
typedef unsigned char sha1_byte_t; /* 8bits unsigned integer */
#define BITS 8
/* Define the state of SHA-1 algorithm */
typedef struct {
sha1_byte_t sha1_buf[64]; /* 512 bits */
int sha1_count; /* How many bytes are used */
sha1_word_t sha1_size1; /* Length counter Lower Word */
sha1_word_t sha1_size2; /* Length counter Upper Word */
sha1_word_t sha1_h[5]; /* Hash output */
} sha1_state_s;
#define SHA1_OUTPUT_SIZE 20 /* in bytes */
/* External Functions */
#ifdef __cplusplus
extern "C" {
#endif
/* Initialize SHA-1 algorithm */
void sha1_init(sha1_state_s *pms);
/* Append a string to SHA-1 algorithm */
void sha1_update(sha1_state_s *pms, sha1_byte_t *input_buffer, int length);
/* Finish the SHA-1 algorithm and return the hash */
void sha1_finish(sha1_state_s *pms, sha1_byte_t output[SHA1_OUTPUT_SIZE]);
#ifdef __cplusplus
}
#endif
#endif